atc1921 atc1921
  • 02-09-2016
  • Mathematics
contestada

what two numbers multiply to get 30 also add up to get -4????

Respuesta :

nobillionaireNobley
nobillionaireNobley nobillionaireNobley
  • 04-09-2016
Let the two numbers be x and y
xy = 30 . . . . . (1)
x + y = -4 . . . . .(2)
From (2), x = -4 - y . . . . . (3)
Putting (3) into (1), we have:
(-4 - y)y = 30
-4y - y^2 = 30
y^2 + 4y + 30 = 0
y = -2 + i√26 and x = -2 - i√26
Answer Link

Otras preguntas

What is cos P?  Right triangle PQR with a short leg measuring 5, a long leg measuring 12, and the hypotenuse as 13A. 5/12B. 12/13C. 5/13D. 12/5
Who was the African-American who called the war with Mexico disgraceful and cruel? Why?
A pea plant is heterozygous for height (Tt). Which allele will be carried by a pollen grain produced by the plant?  A.T only  B.t only  C.T and t  D.T or t
Sacha has 4 quarters in her pocket.she has 6 timés as many quarters in her piggy Bank. Draw a picture to show thenumber of quarters sacha has in her piggy Bank.
The last of Wilson's Fourteen Points called for
Who were the Britons fighting against in the middle ages?
Janette bought a portable CD player on sale. The regular price was $100. She was charged $89. a) What percent of the regular price did Janette pay? b) What perc
If the circumference of a baseball is 24 cm what is the volume of the object
What part of the cell function as factories to produce proteins???
Which decimal is equal to 7/10?A. 0.71B. 0.7C. 0.07D. 0.071